To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie 2 Flow measurements of C. atlantica swimming. Vectors indicate flow direction and magnitude, and color contours represent vorticity. Recorded at 1400 frames per second and played back at 25 frames per second. A novel cylindrical overlap-and-fling mechanism used by sea butterflies Ferhat Karakas, Amy E. Maas, and David W. Murphy Journal of Experimental Biology 2020. 223:None-None; doi: 10.1242/jeb.221499 Download Original Video